/*
  将下面异步代码使用 Promise 的方法改进
  尽量用看上去像同步代码的方式
  setTimeout(function () {
    var a = 'hello'
    setTimeout(function () {
      var b = 'lagou'
      setTimeout(function () {
        var c = 'I ♥ U'
        console.log(a + b +c)
      }, 10)
    }, 10)
  }, 10)
*/

new Promise((resolve, reject) => {

  var str = "hellow";
  resolve(str);

})
  .then(function (result) {

      var str = "lagou";
      return `${result} ${str}`;

  })
  .then(function (result) {

      var str = "I ❤️ U";
      return `${result} ${str}`;

  })
  .then(function (result) {

      console.log(result)

  });